/Engine/Source/Runtime/Engine/Public/AnimationRuntime.h
static void BlendTwoPosesTogetherPerBone ( const [FAnimationPoseData](API\Runtime\Engine\Animation\FAnimationPoseData) & SourcePoseOneData, const [FAnimationPoseData](API\Runtime\Engine\Animation\FAnimationPoseData) & SourcePoseTwoData, const [TArray](API\Runtime\Core\Containers\TArray)< float > & WeightsOfSource2, [FAnimationPoseData](API\Runtime\Engine\Animation\FAnimationPoseData) & OutAnimationPoseData )